Forged brake-beam fulcrum and process of making same



July 3, 1923. 1,460,773

E. R. VIBERG FORGED BRAKE BEAM FULCRUM AND PROCESS OF MAKING SAME FiledOct. 24. 1921 3 26 Q 2 56.9 F as. 7 25 26 2724 Z/ L *7 ul\ \1 ll Wren/0rfmes/ fi? V/becq Patented July 3, 1923; r

crums and Processes of Making Same, of

which the following is 1 exact description. Thisinvention'relates toimprovements in brake beamv fulcrurns and method ofmaking a full, clear,-and same,, and the object of the; invention is to. provide a strong,durable and. inexpensive 1 fulcrum.which may-be manufactured very easilyand material.

' The invention quickly from readily obtainable comprises briefly-afulcrum formed to; tubular shape by bending up a flat sheet of materialand welding the edges to- I gether, or not, as desired.

.Inthe drawings which illustrate one em ,bodimentof. the invention Fi -1is a plan view-of a 2 forming the fulcrum.

Fig. 2 isa plan viewjof the blank bent.

' I tojformflang'esas: indicatedwinFigure:10. IThese flangeswill.naturally-stiffenthe'iplate" and interfere with the bending ,ther'pfto "cylindrical form.l fl hereforey'after-fthez zpreg y liminaryforming, the plate is placed between g; dies which form it to twosubstantiallyi.sentii v Y 'circulaiiportions, as illustrated in-Figure11, and Iati thefsame time 'gives' finalLform to 3 ai thebo'sses 27. 1 fItwill be obvious that the" plate may" be 1 1' :bent to tubularf0rm...before*"th e.bosses 27 are formed and that "the iibo'sses cmaythen be. formed. yIt will be obvious, however, thatth'e Lbos ses; willnot be sofeasilyv formed v -by.'this latter YmethO'dQand .ther'eforewtheformer method is? preferable". ""It gwill' also. be understood thatthe'ib'osses 27 may? be x 1 to tubularfor'm. i

I Fig.3 is.an end elevationfcorrespo'nding with Figure2.

1 Fig.4 is a plan v ewaofthe' fulcrum showing the outer end formed.

I Fig. 5 is anendelevationcorresponding to Figure 4. Fig. 6 i'sa sectionon the line 6 -6, Fig- (Fig. 7 is a -section, 'on the line-7+7, Figure5.3 Figs; 8 and- 9 ;areresp,ectively a plan and elevation showing theattaching; lugs formed. Fig. .10 is an enlarged sectional view on theline 10-:10, Figure L1, illustrating the I preliminary-forming thegpinbosses.

Fig. 11' is a 'corresponding'jview illustrat formed of separatememberslsuchfas flanged zferrules 29 fthrust'throughthe openings andv fr v t then swage'd as indicatedin =Figure'l2fgboth Jto hbld "theferrulesfinyplace and'ftoi 'ming'the complete forming of the, bosses'anda preliminary-step in forming. the flat blank to tubular'jshapeif Fig-12is-an-enlarged sectional, viewjllus;

trating an alternative-rriethodof forming thepin-bossesf .1 g 1,

I Referring. more particularly toqthe, drawings,'2l-de si'gnates a flatblank, preferably stampedv to i.th,e shape shownin :Figur 1,. thatis tosay,with*four shortyclo'selyspaced projections=22-on one end, and apairof. comparatively long, widely spaced pr0jec-- tions 23 attheoppositeyend arranged asym,-

blank tada "part suitable curvature thereto.

I FORGED BRAKE-BEAM FULonuMlnnnrBocEss or MAkInG"semis. I 2:;

ERNEST R. vm'm wjmumm wmm mam-.-

earthl of the mint. Thiniidal with.

of the blank is provided with a central longitudinallydisposed slot 24and with apair of notches 25 disposed on? in-each longitudinal" j edgethereof, and each notch being the same length and substantially halfthev width of the slot 24:, so that if the two longitudinal edges of theblanking brought together the notches: 25 willunite to formtwoslotsexactlyisimilan to theslots-QAQ and disposeddiametricallyopposite the. same. Be tweeni circular j openings 26, arefformed each sur rounded, by-a ,lip, or boss 27 projecting from 26 asinitially formed =maybe much 5 smaller holes wan'd provide the bosses27. I 1

the slots 24; and notches 25 and substantially it I midway'wof thelength thereof,yapairrof I i on'e'surfaceof; the plate} {These openings,267

aredesigned toreceive; a pi-votgpin to'colli .Kneet a brake leverto'thefulcr'um. The holes than theffinishedsize, so as to permit-of the p,metal beingiupsetonexpande'd to-enlargethe i'f i paneling the metalaround the apertures T26R2 Thextubular form'iof'the'fulcruin staff vrived atpreferablv after the 1-bosses '2-7, have beenformedgbut it'wil-lbelunderstoodthat I the blank ofFigure l rmay be"bent to"t ubuv larfermand the bossesiprovided'afterwards; j r Preferably, howevery i {the'-cuI'.vature f 'im}- f 1. parted; to 1 the blank in" forming-tithebosses n will be notedthat' this curving of the blank provides twonearly semi-circular portions 1 connected by'a fiat portion representingthe unbent'metal at the ends ofthe slot 2e. To "complete the tubularformation theplate or blank, When i'n the shape illustrated in Fig.\

' 11, is bent by means of dies around a mandrel, so that it assumes-atrue cylindrical shape and the longitudinal edges at each end of thenotches are brought into abuti ting relation. er'ly' heated andsufiicient pressureis applied the edges Will-be. Welded together in thesame- If-the blank has been prop- "manner as butt eld pipe is madefl It'ivi 'll l5 1 maybe-omitted as thetubular form will in itself besufiicientlyxstrong ithout ad ditional 'stiffening'that 'Will- 'result"from be understood, however, that actual welding Welding. The fulcrumhas now reached the stage illustrated in Figures 2 and? t It \villbemesa, especially n Figure that the pr'oje'ctions' 24 "are spacedequidistantly around the 'tubetfllhis end-of the? tube is" now heatedand placed; in suitable "22, so that they are substantially doubleddi'eswhich bend in two, opposite projections I "orben t'uponthe Wall ofthetube. The-re- -The first pair of projections form lips 31- to;

retainv the tensionmember of a brake beam orthe likeQand the second pairof projecg=tions' form; a seat, 32"betWeen' the lugs -81, this seatbeing preferably curved from end to-end ,,as-clearly shown in Figure 7.

" .and thegprojections 23 turned atright an.

I may be attached t'o'fafbrake beam. "Nothing has been said regardingthe di-- gles. to the ax'is of the tube,'a'sshiown in Figure 9, toform'lug's byfwhich the fulcrum mensi'on's or particular shape of thefule'rum, as this: is ,obviously a" matter" of design and not ofinvention. It may, howleverybevfiiell to draw; attention' to the facttthatx the projections 22 n'riust be so spaced "relatively to, ,SayyithQ SlOt24 that the seat- 1 formed these members will" be .in'properemgulars rrelation to theplane of. oscillation of a. brake leverpassingthrough "the slot 24L Obviously many modificationsmay be made in, the"form; of the "fulcrum and in the specific details of the process of"manufacturing "same.-.- In iact, it is impossible to -lay'doW'neverydetail'of a'process as the details' 'of manufacture-may necessarilybe varied byv changes in the design?" "1 The fulcrum-"according to thisinvention maybe formed very easily and cheaply} of curved portionstogether.

It will be understood that as the pipe, thus enabling"'short lengthsofpipe, which would otherwise be Wasted, t be utilized. The proc'ess'offorming the ful'crums is quick and easy and does not require the use ofheavy or special; n1achinery. The

of comparatively light Weight. The longitudinal seam need not be Weldedb as "allready beenf stated. The curv'e' of the ten-" sion member overits seat '32 {will serve to hold an unweldejd fulcrum from'opening atthe end, While the pijvotpin which passes crum will hold the butt jointfrom opening; at thispoint. There is, as a matter oif fact, little or.no strain on the fulcrum between the pivot pin and thelu'gs 23 attachedto the r compression member and it is immaterial if the seam openssomewhat- 'between these"'f r. Having ,husdescribed my invention, ivhatpoints.

, 1. Alb'rake beam' -fu'lcrumeomprising'a fiat sheet "bent" tosubstantially cylindrical J,

*form, projections from one end of said sheet turned inwardly andforming a tension memberse'atand tension member retaining ted feet'atf'the lugs, and outwardly direc opposite endo-f the fulcrum; 1

2. A process 10f-making'br'akegbearn fulv through an' intermediate pointof the fulicrums which comprises forming a'flat blank, bending the-blankto substantially cylinf drical form and turning in one end f-"the'.cylindri'cally formed blanktoi provide a-ten SiOn member seat. Theop-posite end of the tube may now b sligh tly fiattened as indicated inFigures,

A process of making brake beam ful stantially the finished cylindricalcurvature I and simultaneouslyforgingpin"hole-bosses in the curvedportions and then bending the v blankintermediatefthe curyed portions toform'a tubular body.

, 4, proc ssor making brake beam f -ulii i crums which comprises forminga fiat blank, bendlng to v the. fin] shed a curvature spaced portionsofthe blank extending from opposite" edges inwards and simultaneouslyform,- V v ing pin hole bosses in" the curved portions and thenbending'the lflank betWeen the curved: portions" [to' bring the edgesthe 5. A process of making bra-kebeam nil crurns, whichcomprisesformingaflat blank,

, bending the blank to" tubular formfturning upsetting the blank rtoform pinhole bosse's,

in one end of the blank ar ma n Y tachment to a compression memb 1.

C'member seat; andfforming outwardly turned lugs at the opposite end ofthe blankfo'r' 'at-- 75 1 fulcrum itself is extremely strong anddyet 6.A process of making brake beam fulcrums, which comprises shaping a blankto provide a series of short fingers at one end a and a series of longerfingers at the opposite cated' opposite same, and turning in certain ofthe short fingers of the blank through approximately 90 to form atension member seat, and turning in'the remaining fingers throughapproximately 180 to form tension member retaining lugs on each side ofthe seat, and turning out the longfingers at the my hand. v

opposite end theblank to form attaching I plugs; v a

7 In a process of making brake beam .ful-s crums, forming ablank havingan opening 20 I and-notches in the edges thereof corresponding to saidopening, forming pin holes and" pin hole bosses between the openingand..

notches, and bending the blank-to tubular; v

d opposite the blank opening-and the form w'herebythe notches unite toform an openin pin holes are brought into alignment with one another atright angles to the plane of the opening.

, In witness whereof, have hereunto set ERNEST R. VJZBERG."

